Syrian Kurds
Syrian Kurds gather around a U.S. armored vehicle during a demonstration against Turkish threats next to a U.S.-led international coalition base on the outskirts of Ras al-Ain town in Syria's Hasakeh province near the Turkish border on Sunday Oct. 6, 2019. US forces in Syria started pulling back today from Turkish border areas, opening the way for Ankara's threatened military invasion and heightening fears of a jihadist resurgence (Delil Souleiman/AFP via Getty Images)
Military vehicles carrying military aircraft participate in a military parade at Tiananmen Square in Beijing on October 1, 2019, to mark the 70th anniversary of the founding of the Peoples Republic of China. (GREG BAKER/AFP/Getty Images)
Ukrainian President Volodymyr Zelensky (C) examines the small arms made in Ukraine during tactical exercises of sub-units of the Ministry of Internal Affairs at the National Guard training ground near Stare village, some 80 km from Kiev, on September 30, 2019. (SERGEI SUPINSKY/AFP/Getty Images)
Indian navy sailors salute during the commissioning ceremony of the INS Khanderi, India's second Scorpene-class submarine, in Mumbai, India, Saturday, Sept. 28, 2019.. (AP Photo/Rafiq Maqbool)
Apache helicopters fly past during a full-dress rehearsal for the Indian Air Force (IAF) Day at Hindon Air Force Station in Ghaziabad on the outskirts of New Delhi on October 6, 2019. - The Air Force Day is celebrated in Hindon Air Force Station on October 8. (STR/AFP via Getty Images)
Indian Air Force (IAF) SARANG helicopters display team perform at Vadodara Air Force Station, some 110 kms from Ahmedabad on September 27, 2019. - 'Know Your Air Force' event is organized in a run up to the momentous occasion of 87th Air Force Day Celebrations which falls on October 8, 2019. (SAM PANTHAKY/AFP/Getty Images)
A visitor holds a Ukrainian-made RPV16 thermobaric rocket launcher also known as the "infantry flame thrower" even though it is technically not a flamethrower, but rather a fuel-air explosive weapon, during the 2019 Vietnam Defense and Security Expo in Hanoi on October 2, 2019. (PNHAC NGUYEN/AFP via Getty Images)
German Defence Minister Annegret Kramp-Karrenbauer lands with an helicopter "Sea King" MK 41 on board of the corvette "Oldenburg" anchored at sea near Rostock, northeastern Germany, on September 26, 2019. (BERND WUESTNECK/AFP/Getty Images)
An Indian Air Force (IAF) commando stands in front of a soviet-era S-125 M 'Pechora' air system at Vadodara Air Force Station, some 110 kms from Ahmedabad on September 27, 2019. - 'Know Your Air Force' event is organized in a run up to the momentous occasion of 87th Air Force Day Celebrations which falls on October 8, 2019. (SAM PANTHAKY/AFP/Getty Images)
Airplanes of the People's Liberation Army fly over the square during the military parade for the 70th anniversary of the establishment of the People's Republic of China on October 01, 2019 in Tiananmen Square, Beijing, China. (Photo by Andrea Verdelli/Getty Images)
Russian submarines at the Russian naval base in the Syrian Mediterranean port of Tartus on September 26, 2019. - With military backing from Russia, President Bashar al-Assad's forces have retaken large parts of Syria from rebels and jihadists since 2015, and now control around 60 percent of the country. (Photo by MAXIME POPOV/AFP via Getty Images)
This picture taken on September 25, 2019 reportedly shows a destroyed armored vehicle near the entrance of a cave and tunnel system reportedly used by Syrian anti-government fighters near al-Lataminah in Hama province. - According to the Russian army, this vast underground network was used as a military base and habitation quarters by rebel fighters and as a workshop for making drones, and was abandoned as pro-government forces advanced on the area. (MAXIME POPOV/AFP/Getty Images)
Chinese military vehicles carrying DF-17 roll during a parade to commemorate the 70th anniversary of the founding of Communist China in Beijing, Tuesday, Oct. 1, 2019. Military planners in Washington and elsewhere will be taking note of new missile technology displayed by China, particularly the hypersonic Dong Feng 17 or DF17 ballistic nuclear missile believed capable of breaching all existing anti-missile shields deployed by the U.S. and its allies. (AP Photo/Ng Han Guan)
Skydivers perform during a parade marking the 74th anniversary of the Indonesian Armed Forces in Jakarta, Indonesia, Saturday, Oct. 5, 2019. (AP Photo/Tatan Syuflana)
A Russian Sukhoi Su-35 fighter jet is prepared for take off at the Russian military base of Hmeimim, located south-east of the city of Latakia in Hmeimim, Latakia Governorate, Syria, on September 26, 2019. Russia often refers to troops it deployed in Syria as military advisers even though its forces and warplanes are also directly involved in battles against jihadists and other rebels (MAXIME POPOV/AFP/Getty Images)
Indonesian soldiers parade on tanks march during a parade marking the 74th anniversary of the Indonesian Armed Forces in Jakarta, Indonesia, Saturday, Oct. 5, 2019. (AP Photo/Tatan Syuflana)